Bark-shaving machine



(No Model.)

B. OTT.

BARK SHAVING MACHINE.-

\ Patented Feb. 2, 1886.

UNITED STATES PATENT OFFICE.

BENEDICT OTT, OF LA OROSSE, \VISCONSIN.

BARK-SHAVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 335,533. dated February 2, 1886.

Application filed May 25, 1885.

To all whom it may concern Be it known that I, BENEDICT Orr, a citizen of the United States, residing at La Grosse, in

the county of La Crosse and State of Wisconsin, have invented a new and useful Improvement in Bark-Shaving Machines, of which the following is a full, clear, and exact description.

This invention is an improvement in barkmills; and it has for an object to provide asimple machine for shaving bark for tanners use, in which the knives or cutters will be held in a fixed rim, and the bark will be moved into contact therewith by a revolving carrier having wings by which to force the bark onto the knives or cutters.

The invention consists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a top plan view of my machine with the open position of the case-wings indicated in dotted lines; Fig. 2, a side elevation thereof. Fig. 3 is a vertical longitudinal section of same, and Fig. 4is a partial bottom plan viewshowing the step-bearing.

On a suitable base, A, I mount the circular rim B, which is preferably formed tapering inward toward its lower end, and has an out wardly-proj ected radial flange, B, at its upper edge, and a similar flange at its lower edge.

Spiders l3 furnish a support for the bearingstep B for the lower trunnion of the bark-carrier. These spiders are preferably secured in the base A; but manifestly they could be secured to the lower end of the rim, when so desired. I prefer to form this bearing, as shown in Fig. 4, wit-h quarter-boxes b and set-screws If, by which said boxes may be set to take up wear. The rim is slotted vertically at b at close intervals around it, and has knives O fixed to it. the edges of which project into the slots 1). These knives are usually held adjustably by means of set-screws G, jam-nuts O and fastening-screws O. The fastening'screws pass through slots in the knives and fasten them to the cylinder. The adjusting-screws 0 turn through suitable bearings and engage the rear edges of the knives, and the jam-nuts turn on the screws up against their bearings and operate to secure such screws at any de sired point.

On the upper side of the rim B, I form or Serial No. 166,607. (No model.)

secure a spider, D, which has a central hearing, (l, in line with bearing B. This spider is preferably formed with depending breakerarms D. The hopper E is secured in a suitable manner on the rim B around the spider D, as shown. The carrier F is supported on the shaft F, which isjournaled in bearings d and B. This carrier is preferably formed with a bottom, F", though where desired-this bottom may be fixed to the rim B. It is preferred to support the bottom on the carrier, because by such construction it is revolved and carries the bark with it, and the friction of the bark against a fixed bottom is avoided. To the car rier are fixed wings G, which project outward and are curved rearwardly with reference to the line of motion of the carrier. The outer edges of these wings are inclined vertically, corresponding to the taper of the rim, and in or to such edges I secure steel or similar pieces, g, which fit close to the inner side of the rim and insure the pressing of the bark against the knives in the operation of the machine. On the upper side of one or all of these wings I form or secure breakers G, which operate in connection with breaker-arms D to insure a thorough disintegration of the bark before it enters the carrier, and thus avoid all lumping or clogging of material.

In operation the bark is fed into the hopper and passes thence into the revolving carrier, the revolution of which throws the bark outward against the rim, and the wings pressing it against the cutters it is out into shavings and passes out of slots 12. To retain the shavings close to the rim, I provide case-sections H H, each of which is pivoted vertically at one end, h, to the base,or otherwise to the framing, and is provided near such hinged end with a stud, h fitted to be engaged by the hook H on the movable end of the other section, which movable ends, when in their closed positions, fit snugly against the pivoted end of the next section, as will be understood from the drawings. The cut bark passes down and out between the hinged case and the outer edge of the base, and may be directed into a hopper, elevator, or conveyor, and its sections may be conveniently opened for the purpose of gaining access to the knives in order to sharpen the same or for other purposes desired. These casesections are preferably formed with flanges h at their upper edges, which rest on the upper side of the other one, and they may be adjusted to more or less tension by set-nuts The carrier and drive-shafts have their meeting ends angled to fit in the grooves i. It will be noticed that under unusual strain the springs will permit the plates I to spread apart. vBy this construction the carrier may slip when a stone or other obstruction gets into the rim, and the breaking of the wings is thereby avoided.

Having thus described my invention, what I claim as new isl. The combination of the cylindrical rim having knives, and the revolving carrier operating within said rim and consisting of a base-plate adapted to support the material being cut, a shaft, and wings secured at their inner edgesto and extended outwardly from said shaft, and having their outer edges arranged to move close to the edges of the knives, substantially as set forth.

2. The combination of the rim having cutters, and the carrier arranged Within said rim and comprising a shaft and wings G, secured at one end to and extended outwardly from said shaft and curved rearwardly toward their outer ends with reference to the line of motion, substantially as set forth.

3. The combination, with the framing, the carrier, and the cutting mechanism,of the casesections pivotally supported at one end, whereby their otherends may be moved outward, and provided at such movable ends with latches, substantially as set forth.

4. The combination of the rim having knives C, the carrier having wings G, and breakers G, projected from said wings, and the spider having depending breakers D, substantially as set forth.

5. The combination, with the rim having BENEDICT O'IT.

\Vitnesses:

A. STEI LEIN, J N0. E. NE soN. 

